wok annotate linld/stuff/src/ISO9660.CPP @ rev 21628

linld: more ram for zImage (again)
author Pascal Bellard <pascal.bellard@slitaz.org>
date Mon May 27 23:23:13 2019 +0200 (2019-05-27)
parents 66530154b12f
children 861efbf7a5de
rev   line source
pascal@19515 1 #include "crtl.h"
pascal@19515 2 #include "crtlx.h"
pascal@19515 3 #include "iso9660.h"
pascal@19515 4 #define __ROCKRIDGE
pascal@19515 5
pascal@19571 6 struct isostate isostate;
pascal@19515 7
pascal@20747 8 #if 1
pascal@20747 9 #define setdirofs(to,sec) (*(int*)((char*)&(to)+1) = *(int*)&(sec)<<(SECTORBITS-8))
pascal@20747 10 #define cpydirofs(to,from) (*(int*)((char*)&(to)+1) = *(int*)((char*)&(from)+1))
pascal@20747 11 #else
pascal@20747 12 #define setdirofs(to,sec) (to = (sec)<<SECTORBITS)
pascal@20747 13 #define cpydirofs(to,from) ((to) = (from))
pascal@20747 14 #endif
pascal@20747 15
pascal@21628 16 int isoroot(void)
pascal@19515 17 {
pascal@19825 18 static const unsigned long root = 16UL * 2048;
pascal@19571 19 struct isostate *x=&isostate;
pascal@21628 20 if (isoreadsector(&root) == -1 || strhead(x->buffer+1,"CD001") == -1) {
pascal@19571 21 //close(x->fd);
pascal@19515 22 return -1;
pascal@19515 23 }
pascal@20747 24 setdirofs(x->dirofs, (* (unsigned long *) (isostate.buffer + 0x9E)));
pascal@20632 25 x->dirsize = filesize2dirsize(* (unsigned long *) (isostate.buffer + 0xA6));
pascal@19515 26 return 0;
pascal@19515 27 }
pascal@19515 28
pascal@20747 29 int isoreaddir(void)
pascal@19515 30 {
pascal@19636 31 int size;
pascal@19636 32 char *p;
pascal@19515 33 #ifdef __ROCKRIDGE
pascal@19515 34 char *endname;
pascal@19515 35 #endif
pascal@19571 36 struct isostate *x=&isostate;
pascal@19515 37
pascal@20747 38 if (x->curdirsize == 0xFFFF) {
pascal@19826 39 x->curdirsize = x->dirsize;
pascal@20747 40 cpydirofs(x->curdirofs, x->dirofs);
pascal@19826 41 goto restarted;
pascal@19515 42 }
pascal@20534 43 if (x->curpos >= SECTORSZ || * (short *) (x->buffer + x->curpos) == 0) {
pascal@20538 44 restarted:
pascal@19826 45 if (x->curdirsize < DIRSECTORSZ) return -1;
pascal@20534 46 isoreadsector(&x->curdirofs);
pascal@20453 47 //x->curdirofs += SECTORSZ;
pascal@20453 48 *(int *)((char *) &x->curdirofs+1) += SECTORSZ/256;
pascal@19826 49 x->curdirsize -= DIRSECTORSZ;
pascal@20458 50 x->curpos = 0;
pascal@19515 51 }
pascal@20534 52 p = x->buffer; p += x->curpos;
pascal@20538 53 if ((size = * (short *) p) == 0) {
pascal@19515 54 return -1;
pascal@20538 55 }
pascal@19636 56 x->fileofs = (* (unsigned long *) (p + 2)) << SECTORBITS;
pascal@19636 57 x->filesize = * (unsigned long *) (p + 10);
pascal@20543 58 x->filemod = 0x81ED; if (p[25] & 2) ((char *)&(x->filemod))[1] = 0x41;
pascal@20543 59 //x->filemod = (p[25] & 2) ? 0040755 : 0100755;
pascal@20453 60 //x->filemod = 0100755 - ((p[25] & (char)2) << 13);
pascal@19515 61 #ifdef __ROCKRIDGE
pascal@19515 62 endname = NULL;
pascal@19636 63 // p += 34 + (p[32] & -2); ?
pascal@20534 64 p = x->buffer + 34 + ((p[32] + x->curpos) & -2);
pascal@19515 65 do {
pascal@19636 66 int len = p[2];
pascal@20751 67 # if 0
pascal@19636 68 switch (* (short *) p) {
pascal@19515 69 case 0x5850: // PX
pascal@19636 70 x->filemod = * (short *) (p + 4);
pascal@19515 71 break;
pascal@20751 72 case 0x4D4E: // NM
pascal@20751 73 # else
pascal@20751 74 if (* (short *) p == 0x4D4E) {
pascal@20751 75 # endif
pascal@20751 76 x->filename = p + 5;
pascal@20751 77 endname = p + len;
pascal@19515 78 }
pascal@19636 79 p += len;
pascal@20534 80 } while (x->buffer + x->curpos + size - p > 2);
pascal@19515 81 if (endname)
pascal@19515 82 *endname = 0;
pascal@19515 83 else
pascal@19515 84 #endif
pascal@19515 85 {
pascal@20534 86 p = x->buffer + 33; x->filename = p += x->curpos;
pascal@19636 87 p--;
pascal@20453 88 if (((* (short *) p) & 0xFEFF) -1 == 0) {
pascal@20453 89 x->filename = "..";
pascal@20453 90 if ((* (short *) p) == 1)
pascal@20453 91 x->filename++;
pascal@20453 92 }
pascal@20453 93 else {
pascal@19636 94 p += *p; p--;
pascal@19636 95 if (* (short *) (p) != 0x313B) {
pascal@19636 96 p++; p++; // no ;1 to remove
pascal@19636 97 }
pascal@19636 98 if (p[-1] == '.') p--;
pascal@19636 99 *p = 0;
pascal@19515 100 }
pascal@19515 101 }
pascal@19571 102 x->curpos += size;
pascal@19515 103 return 0;
pascal@19515 104 }
pascal@19515 105
pascal@19825 106 //#define IS_DIR(x)( ((x) & ~0777) == 040000)
pascal@20454 107 //#define IS_DIR(x)( (char)((x) >> 9) == (char)040)
pascal@20454 108 //#define IS_DIR(x)( (*((char*) &x + 1) & (char)0776) == (char)0100)
pascal@20454 109 #define IS_DIR(x)( (*((char*) &x + 1) & (char)0676) == (char)0)
pascal@21628 110 int _isoopen(void)
pascal@19515 111 {
pascal@19825 112 char *name, *s, c;
pascal@19825 113 char _64bits = cpuhaslm();
pascal@19571 114 struct isostate *x=&isostate;
pascal@19515 115
pascal@20528 116 do {
pascal@21628 117 for (s = (char *) x->filename2open; *s == '/' ; s++) {
pascal@21628 118 isoroot();
pascal@19515 119 }
pascal@19825 120 next:
pascal@20751 121 name = s;
pascal@20751 122 do s++; while (*s != '/' && *s);
pascal@19825 123 c = *s;
pascal@19825 124 *s = 0;
pascal@21576 125 for (x->curdirsize = 0xFFFF; isoreaddir() != -1;) {
pascal@19825 126 const char *n = name, *i = x->filename;
pascal@19825 127 if (_64bits) {
pascal@21628 128 if (strhead(i, n) == -1) continue;
pascal@19825 129 n = "64";
pascal@19825 130 i += s - name; // strlen(name);
pascal@19515 131 }
pascal@19825 132 if (strcmp(i, n)) continue;
pascal@19825 133 *s++ = c;
pascal@19825 134 if (IS_DIR(x->filemod)) {
pascal@20747 135 cpydirofs(x->dirofs, x->fileofs);
pascal@19826 136 x->dirsize = filesize2dirsize(x->filesize);
pascal@19825 137 if (c) goto next;
pascal@19515 138 }
pascal@19825 139 isolseek(&x->fileofs);
pascal@19825 140 return 0;
pascal@19515 141 }
pascal@20528 142 } while ((_64bits ^= CPUMASKLM) == 0);
pascal@19825 143 return -1;
pascal@19515 144 }